单项选择题
A.at B.of C.for D.about
We usually choose cargo-handling equipment according to...
单项选择题We usually choose cargo-handling equipment according to（）.
A.the ship type B.the port's organization C.the cargo's nature D.the dockers’ ability
We have two kinds of cargo on board，but（）is dangerous.A...
单项选择题We have two kinds of cargo on board，but（）is dangerous.
A.either B.neither C.none D.no
Vessels transiting the canal must have their accommodat...
单项选择题Vessels transiting the canal must have their accommodation ladders and cargo booms（）.
A.removed B.rigged in C.readjusted D.tested
